package day02;

import java.util.TreeMap;

public class Demo01 {
    public static void main(String[] args) {
        TreeMap<Integer, String> tree = new TreeMap<>();
        tree.put(480, "A");
        tree.put(680, "B");
        tree.put(360, "C");
        tree.put(260, "D");
        tree.put(380, "E");
        tree.put(630, "E");
        tree.put(880, "E");
        System.out.println(tree);
    }
}
